Armature for dynamo-electric machines



(No Model.)

O. F. BRUSH.

, ARMATURE FOR DYNAMO ELBOTRIG MAGHINES. No. 336,087. Patented Feb; 16,1886.

UNITED STATES PATENT OFFICE.

CHARLES F. BRUSH OF CLEVELAND, OHIO.

ARMATUR E FOR DYNAMO-ELECTRIC MACHINES.

EPZECIFICLTION forming part of Letters Patent N0. 336,087, datedFebruary 16, 1886.

Application filed May 13, 1894. Srrial No 131.395.

T0 aZZ whom it may concern:

Beit known that I, CHARLES F. Baum, of Cleveland, in the county ofOuyahoga and State of Ohio, have invented certain new and usefulImprovements in Armatures for Dynamo-Electric Machines; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itpertains to make and use the same.

Figure 1 is aside view of my improved armature-ring without the bobbins.Fig. 2is a top view of the same. Fig. 3 shows the ring partially formedand before the bobbin-spaces have been out out.

The present invention relates to armaturerings for dynamo-electricmachines of thekind shown in Patent No. 285,457, granted to me September25, 1883.

According to the present invention a band formed armaturering isconstructed by winding or building up a series of superposed layers ofband-iron of the full width of the armature and then cutting awayportions to form the bobbinspaces. Iprefer to form the ring by windingthe band-iron upon a suitable base-ring, and in order to insulate thelayers one from another I may cover the band with suitable varnish orpaint, or wind in with the iron an interposed ribbon of paper or othersuitable insulating-web. It is evident that the ring may also be formedby winding two or more bands together, or by buildingup the ring withseparate concentric layers, or by winding one or more long bands withinterposed snort pieces of the same width.

i l i (No model.)

In the drawings,A is the base-ring, to which the hub is secured, andupon which the bandiron is wound or built up. One end of the band-iron Bis secured by rivets or otherwise to the base-ring, and the band is thenwound tightly around the base-ring and uponitselt' in the manner shownin Fig. 3 until the desired thickness of ring is obtained, when the endof the band is secured, as at b, Fig. 1. Suitable bolts or rivets, O,are then passed through the ring radially to secure the layers together,after which the bobbin-spaces are formed by cutting away at the placesindicated at D in Figs. 1 and 2. This may be done by the ordinarymilling, planing, or slotting machines. The ring thus completed may bewound with wire in the ordinary manner, and will form an armature ofexceptional solidity and ethciency.

I claim herein as my invention- An armature composed of superposedlayers of baud-iron wound one upon another, the opposite faces of whichare provided with radial grooves situated directly opposite one anotherand extending the entire width of the ring, the side walls of thegrooves being made integral with the layers of the band, substantiallyas set forth.

In testimony whereof I sign this specifica tion, in the presence of twowitnesses, this 23d day of April, 1884.

CHARLES F. BRUSH.

\Vitnesses:

E. B. PHILLIPs, ALBERT E. LYNCH.

